Did a compression test on my 1999 GSR with 49,000 miles. Please let me know how these numbers look:

#1 - 211
#2 - 217
#3 - 222
#4 - 220

Thanks!

 

Looks good. There is really no need to worry unless two adjacent cylinders are more than 10% off. Right now, yours looks just fine. Inconsistantcies could be in the valve adjustment. If you think there is a problem, get a leak down test done. It can tell how much pressure the cylinder is dropping and where it is going to...


Jason

 

1 and 2 look a little low, could by your piston rings, or valves. But you are fine.